The Logo's color is white during the day After absorbing light the color of the logo will glow in the dark as the picture shown. Breathable canvas material. Cotton handle cotton strap Metal zipper. Smooth nylon fabric lining. Product Dimensions: 12''W x 18''H x 6''D inch Ample roomy Shoulder strap can freely adjust the length. It is a great gift for anime Hetalia Axis Powers fans Let's crazy for it! Whether you are traveling outdoor sport going to school. Multi function Super space this bag is your best choice. Too many choices to choose just follow your heart.